From a81fdef780153f7eefbc324a3b669f59ef1cf760 Mon Sep 17 00:00:00 2001
From: Nicola Zaghen <nicola.zaghen@imgtec.com>
Date: Tue, 21 Aug 2018 15:27:32 +0000
Subject: [PATCH] [InstCombine] Add new tests for icmp ugt/ult (add nuw X, C2),
 C

Differential Revision: https://reviews.llvm.org/D51040

llvm-svn: 340284
---
 test/Transforms/InstCombine/icmp-add.ll | 43 +++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/test/Transforms/InstCombine/icmp-add.ll b/test/Transforms/InstCombine/icmp-add.ll
index ec2fd13315e..49517e580ef 100644
--- a/test/Transforms/InstCombine/icmp-add.ll
+++ b/test/Transforms/InstCombine/icmp-add.ll
@@ -281,3 +281,46 @@ define i1 @slt_zero_add_nuw_signbit(i8 %x) {
   ret i1 %z
 }
 
+define i1 @reduce_add_ult(i32 %in) {
+; CHECK-LABEL: @reduce_add_ult(
+; CHECK-NEXT:    [[A6:%.*]] = add nuw i32 [[IN:%.*]], 3
+; CHECK-NEXT:    [[A18:%.*]] = icmp ult i32 [[A6]], 12
+; CHECK-NEXT:    ret i1 [[A18]]
+;
+  %a6 = add nuw i32 %in, 3
+  %a18 = icmp ult i32 %a6, 12
+  ret i1 %a18
+}
+
+define i1 @reduce_add_ugt(i32 %in) {
+; CHECK-LABEL: @reduce_add_ugt(
+; CHECK-NEXT:    [[A6:%.*]] = add nuw i32 [[IN:%.*]], 3
+; CHECK-NEXT:    [[A18:%.*]] = icmp ugt i32 [[A6]], 12
+; CHECK-NEXT:    ret i1 [[A18]]
+;
+  %a6 = add nuw i32 %in, 3
+  %a18 = icmp ugt i32 %a6, 12
+  ret i1 %a18
+}
+
+define i1 @reduce_add_ule(i32 %in) {
+; CHECK-LABEL: @reduce_add_ule(
+; CHECK-NEXT:    [[A6:%.*]] = add nuw i32 [[IN:%.*]], 3
+; CHECK-NEXT:    [[A18:%.*]] = icmp ult i32 [[A6]], 13
+; CHECK-NEXT:    ret i1 [[A18]]
+;
+  %a6 = add nuw i32 %in, 3
+  %a18 = icmp ule i32 %a6, 12
+  ret i1 %a18
+}
+
+define i1 @reduce_add_uge(i32 %in) {
+; CHECK-LABEL: @reduce_add_uge(
+; CHECK-NEXT:    [[A6:%.*]] = add nuw i32 [[IN:%.*]], 3
+; CHECK-NEXT:    [[A18:%.*]] = icmp ugt i32 [[A6]], 11
+; CHECK-NEXT:    ret i1 [[A18]]
+;
+  %a6 = add nuw i32 %in, 3
+  %a18 = icmp uge i32 %a6, 12
+  ret i1 %a18
+}